what angle is this
 

I saw this on pinterest and I am trying to figure out the size. I am using the 60 degree tri rec ruler but three don't equal half. Also I am trying the tell the strip size I tried 2 1/2 for the bottom two and 1 1/2 for the center but that doesn't allow to flip the ruler. Any ideas?
http://www.pinterest.com/pin/21462535700051487/

As far as I can tell, those are all equilateral triangles (all sides same length, all angles the same (=60°)). Or am I wrong?

You could use three different fabrics, then you can flip the ruler (but the middle would be one colour all around). Or four strips instead of three.

My friend made one using a jelly roll and additional background. Therefore stres as Cathy says were 21/2" joined together. The triangle would be 360 divide by 6 ( number of sections ) makes 60*
An equilateral triangle ruler needed.

I could be wrong but I didn't think the tri rec ruler was a 60 degree triangle? http://softexpressions.com/software/...zQuilt.php#tri

Could you maybe try cutting a 60 degree triangle using your straight ruler and compare the triangles? http://quilting.about.com/od/rotaryc...g_shapes_5.htm

Its a great pattern :)

THE TRI REC RULER IS NOT A 60 DEGREE RULER!!! Sorry, didn't mean to shout! The picture in the link is made using a 60 degree. YOu need to get a different ruler, or, you can use the 60 degree mark on your 6X24" ruler. Looking at the size of the triangles in the quilt, however, I think it's going to be much easier to get the correct ruler. Creative Grids has a 12" version.

I think it is a 60 degree. Look at this table mat I found. The quilt is just bigger

http://lovelaughquilt.blogspot.com/2...y-hexagon.html

I have seen this pattern before being the shape of a hexagon. The pieces are sewn in strips, then cut with a 60 degree triangle ruler. 60 x 6=360 degrees. You have to be very accurate with your seam allowance so that the seams will match. The width of the strip depends on how large you want to make your block.

It is done with a sixty degree triangle ruler. My ruler is the creative grid one. The patterns I have use jelly rolls. I have a few books on these. Off of the top of my head one is called Sizzling Sixties by Anka's Treasures.

I made one similar called the Merry Go Round. 60 degrees like everyone says.

I would cut the strips all the same size. The center will come out much smaller due to the angle that takes up more seam allowance when you put them together. Try it with some scrap fabric to see if it is the look you are aiming at.

With the tri-rec ruler, you need to make the height of all three pieces the same.

This is the classic kaliedescope block only left as a hexi. I am working on a kaliedescope quilt. It was definitely worth the $$ to get this ruler for it. http://www.hancocks-paducah.com/NOTIONS/Rulers/CGRT60

I want to shout, too, about this.

The Tri-Recs Ruler is made for the triangle in a square unit (Peaky and Spike - Doreen Speckmann).

The angles in a Tri-Rec Ruler Set are:
Small triangle: (approximately) 26.565, 90, and 63.435 degrees
Large triangle: (approximately) 63.435, 63.435, and 53.130 degrees

At one time I thought that the 30-60-90 or 60-60-60 degree rulers were interchangeable with the Tri-Rec rulers.

They are NOT.

Thanks for backing me up ;-) I taught geometry for a while and I wonder if any of those students who thought that subject was a waste of time are now quilters!

Actually, I use the (reverse tangent function) - I don't remember the proper name for it - to get the angles.

I use basic trig and geometry a LOT! (Didn't get much further than the basics, but they sure are useful!)

I have learned a lot the backwards way - by doing it wrong and THEN figuring out how I SHOULD have done it!

Ah, well. Learn and live.

Some things just are not interchangeable.

They are 60 degree angles. A triangle has 180 degrees, total angles. These 3 are even, so each has to be 60 degrees.

http://www.quiltinaday.com/shoponline/rulers
E. Burns has the ruler for kaleidoscope blocks, she always has good easy patterns.
The block is sometimes called a spider web.

That is very cute!
I used the wrong ruler once and made a mess out of some really cute fabric.......so I try to remember the old "measure twice & cut once" PLUS>>>>>>>>Look to see you are using the correct angle!

I may be wrong here, but I thought the kaleidoscope block was made up of 45 degree triangles - thus making making an octagon w/HST at four corners to make a square block. I did make one a long time ago, so I may be getting triangles confused here......or maybe there are now variation of that block....

I did a few of these using the large wedge "ruler" from Missouri Star. I can't find 1 right now so am not sure if I ended up with 6 or 8 wedges but it turned out fine.

I may be wrong here, but I thought the kaleidoscope block was made up of 45 degree triangles - thus making making an octagon w/HST at four corners to make a square block. I did make one a long time ago, so I may be getting triangles confused here......or maybe there are now variation of that block....

OMgoodness, you are absolutely correct. don't know what I was thinking when I said Kaledioscope left as a hexi. The spiderweb and kaleidoscope blocks are indeed 45 degree angles and form and octagon and what the OP linked to is a 60 degree angle. Wow, I am starting to scare myself with all the mistakes, typos and forgetfulness I have had lately.

I've seen what I consider "kaleidoscope type blocks" with as few as three pieces and up to twenty or so. The ones with only three or four pieces have four sides, but the ones using more pieces can be made with triangles. I think the ones made with six or eight triangles are used the most often.

The units made with equilateral triangles will fit together differently than the ones made with the 67.5, 67.5, 45 degree triangles.

Interesting topic to look up: Reflection symmetry